Yes these can be converted to any type of system in the parameter settings , flue sections are push fit only , you are not connecting a cold water supply to the boiler so I would probably add a isolation valve to the hot outlet which can be opened to check for any problems which may occur as a...
Yes compression fittings , the easiest would be a compression coupling with a imperial olive in one end and a short length of new 22mm copper pipe , but you can get 22x 3/4 solder adapters if you have the tools and skills. Kop
Completely your choice a.service type full bore valve looks neater and is only a problem is there'd is reduced access to it , saying that I often use vales with butterfly types handles. Kop
You need as drainage company to clear the blockage free the drain up and jet it , if you own the property then I'd say contact your swearage company you pay your bill to , if your in a rented property then its down to.your landord to arrange for the work to be done . Kop
Piece of mind is a wonderful thing I'd recommend replacing it all 5-6 suspect movements your chucking good money at bad otherwise, your home insurance will cover most of it anyway?? . Kop
Hhmm was there a smell when vented did water come out? test the water there's many Kits available and we should really be doing it . I would say it needs a clean and possibly a new vessel you may possibly get away with not doing it ? , but if you're gonna be there a day why not do it and avoid...
Have you physically checked the pressure in the system ? it could just be a faulty gauge or partial blockage in the tube , I'd suggest and good hot flush then a chemical clean and mains water flush check then expansion vessel is charged to 0.7 -1 bar add a couple of litres of quality inhibitor...
Over time the cylinder can loose its air bubble there is a floating baffle inside your cylinder the air gap needs resetting, turn off the mains cold water supply to the cylinder open up 2 hot water taps and leave them open go back to the cylinder,
The black knob on the pressure relief is spring...
As Shaun says boiler is under warranty messing around with radiators pressure or air in the system could be the problem, anything else is a warranty call out 😉👍kop
Yes that would work in my opinion not a expert in solar but I have worked on a few and fitted some . Just make sure you use good quality products and heat proof cables some immersion heaters are not very good quality . Kop